Business has its ups and downs, and so, naturally, do women in business. (Bye-bye, Martha!) But the story of this list is one of achievement: The credentials of these women,
including the 13 newcomers, are the strongest yet.

Questions about her health and Fidelity's well-being have thrown into doubt the idea that Johnson will lead the $12.9 billion mutual fund giant someday. A number of executives
have quit this year, including key players within her unit, which dominates the 401(k) market. But Johnson is still a major shareholder - and CEO Ned Johnson's daughter.